20940228 has 24 divisors (see below), whose sum is σ = 54289760. Its totient is φ = 6980040.

The previous prime is 20940203. The next prime is 20940251. The reversal of 20940228 is 82204902.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96838 + ... + 97053.

Almost surely, 2^20940228 is an apocalyptic number.

It is an amenable number.

20940228 is an abundant number, since it is smaller than the sum of its proper divisors (33349532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20940228 is a wasteful number, since it uses less digits than its factorization.

20940228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193904 (or 193896 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20940228 is about 4576.0493878454. The cubic root of 20940228 is about 275.6304126847.

The spelling of 20940228 in words is "twenty million, nine hundred forty thousand, two hundred twenty-eight".